GS2 — Oryza sativa Japonica

Summary

OsGS1 (GS2) on rice chromosome 3 encodes a glutamine synthetase (EC 6.3.1.2). The product belongs to the Gln_synt_N and Gln_synth_cat_dom families and is annotated with glutamine synthetase activity, as well as associations with glutamate-tRNA ligase, histone acetyltransferase, SUMO transferase, and calmodulin binding activities. In rice, OsGS1 is linked to responses to salt, drought, osmotic stress, aluminium toxicity, and both abiotic and biotic stress. The gene is associated with numerous agronomic traits including grain size, weight, thickness, shape, amylose and sucrose content, spikelet number and weight, panicle number, tiller number, root length, chlorophyll content, photosynthetic rate, leaf senescence, flowering time, and heat tolerance. It localises to the chloroplast thylakoid, stroma, and envelope, as well as the apoplast and plasmodesmata, and is associated with nitrogen assimilation, photorespiration, the TCA cycle, glutathione metabolism, and sucrose anabolism.